/**
* saveImage
*
* @param UploadedFile $file
* @param string $imageName
*/
public function saveImage($file, $imageName)
{
if (!$file) {
return;
}
$uploadDir = $this->getUploadDir();
$this->prepareUploadDir($uploadDir);
if (is_array($this->thumbs) and !empty($this->thumbs)) {
foreach ($this->thumbs as $dir => $size) {
$img = Image::factory($file->tempName);
// If $size is array of dimensions - resize, else - just save
if (!is_array($size)) {
$size = [$this->slider->width, $this->slider->height];
}
$img->resize(implode(',', $size))->save($uploadDir . '/' . $dir . '/' . $imageName);
}
@unlink($file->tempName);
} else {
$file->saveAs($uploadDir . '/' . $imageName);
}
}
/**
* @param integer $width
* @param integer $height
* @param string $dir
* @param string $attr
*
* @return string
*/
public function getCroppedImage($width, $height, $dir = 'full', $attr = 'image')
{
if (!is_file($this->getCroppedImagePath($width, $height, $attr)) && is_file($this->getImagePath($dir, $attr))) {
$image = Image::factory($this->getImagePath($dir, $attr));
$old_aspect = $image->width / $image->height;
$new_aspect = $width / $height;
if ($old_aspect == 1) {
if ($width > $height) {
$image->resize($width, $height, Image::WIDTH);
} else {
$image->resize($width, $height, Image::HEIGHT);
}
} elseif ($old_aspect < $new_aspect) {
$image->resize($width, $height, Image::WIDTH);
} else {
$image->resize($width, $height, Image::HEIGHT);
}
$image->crop($width, $height);
$image->save($this->getCroppedImagePath($width, $height, $attr));
}
return Yii::$app->request->baseUrl . '/images/' . trim($this->tableName(), '{}%') . '/_cropped/' . $width . '_' . $height . '_|_' . $this->{$attr};
}
public function uploadImage()
{
if ($this->validate()) {
if (!$this->imageFile) {
return true;
}
if ($this->avatar) {
unlink(\Yii::getAlias('@webroot') . '/' . Yii::$app->params['uploadPath'] . $this->avatar);
unlink(\Yii::getAlias('@webroot') . '/' . Yii::$app->params['uploadPreviewPath'] . $this->avatar);
}
$imageName = Yii::$app->security->generateRandomString() . '.' . $this->imageFile->extension;
$imageDatePath = date('Ymd') . '/';
$imageDir = \Yii::getAlias('@webroot') . '/' . Yii::$app->params['uploadPath'] . $imageDatePath;
FileHelper::createDirectory($imageDir);
$resultSaveImage = $this->imageFile->saveAs($imageDir . $imageName);
if ($resultSaveImage) {
$imagePreview = Image::factory($imageDir . $imageName);
$imagePreview->resize(200, 200);
$imagePreviewDir = \Yii::getAlias('@webroot') . '/' . Yii::$app->params['uploadPreviewPath'] . $imageDatePath;
FileHelper::createDirectory($imagePreviewDir);
$resultSaveImagePreview = $imagePreview->save($imagePreviewDir . $imageName);
if ($resultSaveImagePreview) {
$this->avatar = $imageDatePath . $imageName;
return true;
}
}
}
return false;
}
/**
* Execute a watermarking.
*
* @param Image $image watermarking Image
* @param integer $offset_x offset from the left
* @param integer $offset_y offset from the top
* @param integer $opacity opacity of watermark
* @return void
*/
protected function _do_watermark(Image $watermark, $offset_x, $offset_y, $opacity)
{
if (empty(self::$_available_functions[self::IMAGELAYEREFFECT])) {
throw new ErrorException('This method requires :function, which is only available in the bundled version of GD', array(':function' => 'imagelayereffect'));
}
// Loads image if not yet loaded
$this->_load_image();
// Create the watermark image resource
$overlay = imagecreatefromstring($watermark->render());
imagesavealpha($overlay, TRUE);
// Get the width and height of the watermark
$width = imagesx($overlay);
$height = imagesy($overlay);
if ($opacity < 100) {
// Convert an opacity range of 0-100 to 127-0
$opacity = round(abs($opacity * 127 / 100 - 127));
// Allocate transparent gray
$color = imagecolorallocatealpha($overlay, 127, 127, 127, $opacity);
// The transparent image will overlay the watermark
imagelayereffect($overlay, IMG_EFFECT_OVERLAY);
// Fill the background with the transparent color
imagefilledrectangle($overlay, 0, 0, $width, $height, $color);
}
// Alpha blending must be enabled on the background!
imagealphablending($this->_image, TRUE);
if (imagecopy($this->_image, $overlay, $offset_x, $offset_y, 0, 0, $width, $height)) {
// Destroy the overlay image
imagedestroy($overlay);
}
}
protected function _do_watermark(Image $image, $offset_x, $offset_y, $opacity)
{
// Convert the Image intance into an Imagick instance
$watermark = new Imagick();
$watermark->readImageBlob($image->render(), $image->file);
if ($watermark->getImageAlphaChannel() !== Imagick::ALPHACHANNEL_ACTIVATE) {
// Force the image to have an alpha channel
$watermark->setImageAlphaChannel(Imagick::ALPHACHANNEL_OPAQUE);
}
if ($opacity < 100) {
// NOTE: Using setImageOpacity will destroy current alpha channels!
$watermark->evaluateImage(Imagick::EVALUATE_MULTIPLY, $opacity / 100, Imagick::CHANNEL_ALPHA);
}
// Match the colorspace between the two images before compositing
// $watermark->setColorspace($this->im->getColorspace());
// Apply the watermark to the image
return $this->im->compositeImage($watermark, Imagick::COMPOSITE_DISSOLVE, $offset_x, $offset_y);
}
